CVE-2021-43256

{"id": "CVE-2021-43256", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.8, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "MEDIUM", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "secure@microsoft.com", "affectedData": [{"cpes": ["cpe:2.3:a:microsoft:office:2021:*:*:*:ltsc:*:*:*"], "vendor": "Microsoft", "product": "Office Online Server", "versions": [{"status": "affected", "version": "https://aka.ms/OfficeSecurityReleases", "lessThan": "16.0.10381.20001", "versionType": "custom"}], "platforms": ["Unknown"]}, {"cpes": ["cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:*:*"], "vendor": "Microsoft", "product": "Microsoft Office 2019", "versions": [{"status": "affected", "version": "19.0.0", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"cpes": ["cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:*:*"], "vendor": "Microsoft", "product": "Microsoft 365 Apps for Enterprise", "versions": [{"status": "affected", "version": "16.0.1", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"cpes": ["cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:*:*"], "vendor": "Microsoft", "product": "Microsoft Office LTSC 2021", "versions": [{"status": "affected", "version": "16.0.1", "lessThan": "https://aka.ms/OfficeSecurityReleases", "versionType": "custom"}], "platforms": ["x64-based Systems", "32-bit Systems"]}, {"cpes": ["cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:*", "cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*"], "vendor": "Microsoft", "product": "Microsoft Excel 2016", "versions": [{"status": "affected", "version": "16.0.0.0", "lessThan": "16.0.5254.1000", "versionType": "custom"}], "platforms": ["32-bit Systems", "x64-based Systems"]}, {"cpes": ["cpe:2.3:a:microsoft:excel:2013:sp1:*:*:rt:*:*:*", "cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x86:*", "cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x64:*"], "vendor": "Microsoft", "product": "Microsoft Excel 2013 Service Pack 1", "versions": [{"status": "affected", "version": "15.0.0.0", "lessThan": "15.0.5407.1000", "versionType": "custom"}], "platforms": ["ARM64-based Systems", "32-bit Systems", "x64-based Systems"]}, {"cpes": ["cpe:2.3:a:microsoft:office_web_apps_server:2013:sp1:*:*:*:*:*:*"], "vendor": "Microsoft", "product": "Microsoft Office Web Apps Server 2013 Service Pack 1", "versions": [{"status": "affected", "version": "15.0.1", "lessThan": "15.0.5407.1000", "versionType": "custom"}], "platforms": ["Unknown"]}]}], "published": "2021-12-15T15:15:10.730", "references": [{"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43256", "tags": ["Patch", "Vendor Advisory"], "source": "secure@microsoft.com"}, {"url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43256", "tags": ["Patch", "Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "Microsoft Excel Remote Code Execution Vulnerability"}, {"lang": "es", "value": "Una vulnerabilidad de Ejecuci\u00f3n de C\u00f3digo Remota en Microsoft Excel"}], "lastModified": "2026-06-17T04:10:44.587", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*", "vulnerable": true, "matchCriteriaId": "3259EBFE-AE2D-48B8-BE9A-E22BBDB31378"}, {"criteria": "cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*", "vulnerable": true, "matchCriteriaId": "CD25F492-9272-4836-832C-8439EBE64CCF"}, {"criteria": "cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "48B20360-1A85-4A6A-BA03-0B62C97CCB0C"}, {"criteria": "cpe:2.3:a:microsoft:excel:2013:sp1:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "E8426C4D-C00D-44C2-B072-9D600C8B9543"}, {"criteria": "cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "CD88F667-6773-4DB7-B6C3-9C7B769C0808"}, {"criteria": "cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "B342EF98-B414-44D0-BAFB-FCA24294EECE"}, {"criteria": "cpe:2.3:a:microsoft:excel_rt:2013:sp1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "27745C7E-94A0-4C2A-8318-684CB85F48D2"}, {"criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "CF5DDD09-902E-4881-98D0-CB896333B4AA"}, {"criteria": "cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "26A3B226-5D7C-4556-9350-5222DC8EFC2C"}, {"criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "75F7306B-D1DA-48C2-AF87-4480E161D794"}, {"criteria": "cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "BA9BCD55-F71E-4920-B906-A1386843776A"}, {"criteria": "cpe:2.3:a:microsoft:office_online_server:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E98AE986-FA31-4301-8025-E8915BA4AC5E"}, {"criteria": "cpe:2.3:a:microsoft:office_web_apps:2013:sp1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B3C3FC9A-D8E5-493A-A575-C831A9A28815"}], "operator": "OR"}]}], "sourceIdentifier": "secure@microsoft.com"}